Ghost hunters look for ghosts or evil spirits (demons) in haunted houses, graveyards, old hotels, and other places. It’s likely that some of the first stories cavemen and cavewomen told their little cavechildren were stories about ghosts and demons. It seems just about everybody loves a good ghost story or a scary tale about some wicked demon’s nasty tricks.

Are the ghosts and demons real? So far, scientists haven’t found proof of a single ghost or demon. But that fact hasn’t stopped many people from throwing a bunch of equipment into the trunk of a car and heading out to see if they can find proof that at least one ghost or demon exists.

You may have seen some of these ghost hunters on television. They load up with things like flashlights, EMF detectors, Geiger counters, Gaussmeters (more about these later), tape recorders, video recorders, motion detectors, thermometers, and sometimes even things like Ouija boards and dowsing rods.

These ghost hunters bring flashlights because they seem to always work in the dark. We don’t really know what a ghost or demon is, but for some reason people who look for them are pretty sure they only come out at night. One problem with looking for something at night is that it’s harder to see and easier to trick ourselves into thinking we see something that isn’t really there.